Magnetostriction-polarization coupling in multiferroic Mn<sub>2</sub>MnWO<sub>6</sub>.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 29229914.
- Also identified by DOI 10.1038/s41467-017-02003-3 and PMC identifier 5725588.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Double corundum-related polar magnets are promising materials for multiferroic and magnetoelectric applications in spintronics. However, their design and synthesis is a challenge, and magnetoelectric coupling has only been observed in Ni<sub>3</sub>TeO<sub>6</sub> among the known double corundum compounds to date. Here we address the high-pressure synthesis of a new polar and antiferromagnetic corundum derivative Mn<sub>2</sub>MnWO<sub>6</sub>, which adopts the Ni<sub>3</sub>TeO<sub>6</sub>-type structure with low temperature first-order field-induced metamagnetic phase transitions (T <sub>N</sub> = 58 K) and high spontaneous polarization (~ 63.3 μC·cm<sup>-2</sup>). The magnetostriction-polarization coupling in Mn<sub>2</sub>MnWO<sub>6</sub> is evidenced by second harmonic generation effect, and corroborated by magnetic-field-dependent pyroresponse behavior, which together with the magnetic-field-dependent polarization and dielectric measurements, qualitatively indicate magnetoelectric coupling. Piezoresponse force microscopy imaging and spectroscopy studies on Mn<sub>2</sub>MnWO<sub>6</sub> show switchable polarization, which motivates further exploration on magnetoelectric effect in single crystal/thin film specimens.